A physics-based compact model for FETs from diffusive to ballistic carrier transport regimes

This paper discusses a new emission-diffusion-based compact model for FETs to describe carrier transport in both short and long channel devices. The new model provides a description of the current at any drain bias without empirical fitting and predicts the injection velocity (device on-current). The new model is fully consistent with the widely used virtual-source model for describing transport in quasi-ballistic transistors. The accuracy of the new model is demonstrated by comparison with measured I-V data of III-V HEMTs and ETSOI silicon MOSFETs.